<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="success" @click="roleDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '']" v-for="(item1, i1) in scope.row.children"
                            :key="item1.id" type="flex" align="middle">
                            <!-- 分别渲染123级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="19">
                                <el-row :class="[i2 === 0 ? '' : 'bdtop']" v-for="(item2, i2) in item1.children"
                                    :key="item2.id" type="flex" align="middle">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">
                                            {{ item2.authName }}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag v-for="(item3, i3) in item2.children" :key="item3.id" type="warning"
                                            closable @close="removeRightById(scope.row, item3.id)">
                                            {{ item3.authName }}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <el-table-column type="index" label="-"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size="small"
                            @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="small"
                            @click="removeRoleById(scope.row.id)">删除</el-button>
                        <el-button type="warning" icon="el-icon-setting" size="small"
                         @click="showSetRightDialog(scope.row)">分配权限
                        </el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 添加角色弹窗 -->
        <el-dialog title="添加角色" :visible.sync="roleDialogVisible" width="50%" :close-on-click-modal="false">
            <el-form ref="addFormRef" :model="addForm" :rules="addFromRules">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="roleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 修改角色弹窗 -->
        <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" :close-on-click-modal="false"
            @close="editDialogClosed">
            <el-form ref="editFormRef" :model="editForm" :rules="editFromRules">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 分配权限 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" 
        width="50%" :close-on-click-modal="false" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightsList" :props="treeProps"
            show-checkbox node-key="id" default-expand-all
            :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights"
               >确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>

export default {
    name: '',
    data() {
        return {
            rolelist: [],
            roleDialogVisible: false,
            addForm: {
                roleName: '',
                roleDesc: ''
            },
            addFromRules: {
                roleName: [{ required: true, message: '请输入角色名', trigger: 'blur' }],
                roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }]
            },
            editForm: {},
            editDialogVisible: false,
            editFromRules: {
                roleName: [{ required: true, message: '请输入角色名', trigger: 'blur' }],
                roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }]
            },
            setRightDialogVisible:false,
            // 所有权限的数据
            rightsList:[],
            // 树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            // 默认选择节点id数组
            defKeys:[],
            // 临时保存分配权限角色的id
            roleId:''
        };
    },
    created() {
        this.getRoleList()
    },
    methods: {
        async getRoleList() {
            const { data: res } = await this.$http.get('roles')
            if (res.meta.status !== 200) { return this.$message.error('获取角色列表失败') }
            this.rolelist = res.data
        },
        addRole() {
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) return
                const { data: res } = await this.$http.post('roles', this.addForm)
                if (res.meta.status !== 201) { return this.$message.error('添加角色信息失败') }
                this.roleDialogVisible = false
                this.getRoleList()
                this.$message.success('添加角色成功')
            })
        },
        async showEditDialog(id) {
            const { data: res } = await this.$http.get('roles/' + id)
            if (res.meta.status !== 200) return this.$message.error('查询角色失败')
            console.log(res)
            this.editForm = res.data
            this.editDialogVisible = true
            console.log(this.editForm)
        },
        editDialogClosed() {
            this.$refs.editFormRef.resetFields()
        },
        editRoleInfo() {
            this.$refs.editFormRef.validate(async valid => {
                if (!valid) return
                const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
                    roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc
                })
                if (res.meta.status !== 200) return this.$message.error('修改角色信息失败')
                this.editDialogVisible = false
                this.getRoleList()
                this.$message.success('修改角色信息成功')

            })
        },
        async removeRoleById(id) {
            const confirmResult = await this.$confirm('确定删除该角色吗？', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if (confirmResult !== 'confirm') {
                return this.$message.info('取消删除')
            }
            const { data: res } = await this.$http.delete('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('删除用户失败')
            }
            this.$message.success('用户删除成功')
            this.getRoleList()
        },
        // 根据id删除用户权限
        async removeRightById(role, rightId) {
            const confirmResult = await this.$confirm('此操作将永久删除该角色权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if (confirmResult !== 'confirm') {
                return this.$message.info('取消删除')
            }

            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if (res.meta.status !== 200) return this.$message.error('删除权限失败')

            // this.getRoleList()   避免删除后页面刷新
            role.children = res.data
            this.$message.success('权限删除成功')
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status !== 200) return this.$message.error('获取权限失败')
            this.rightsList = res.data
            console.log(this.rightsList)
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible = true
        },
        // 通过递归形式获取角色下所有三级id，并保存
        getLeafKeys(node, arr){
            // 如果当前节点不包含children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item => 
            this.getLeafKeys(item, arr))
        },
        // 监听分配权限对话框的关闭
        setRightDialogClosed(){
            this.defKeys = []
        },
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
            if(res.meta.status !== 200) return this.$message.error('分配权限失败')
            this.$message.success('角色分配权限成功')
            this.getRoleList()
           this.setRightDialogVisible = false
        }
    },

}

</script>
<style lang='less' scoped>
.el-tag {
    margin: 7px;
}

.bdtop {
    border-top: 1px solid #eee;
}

.bdbottom {
    border-bottom: 1px solid #eee;
}
</style>